package com.ideal.manage.esms.controller;


import com.google.code.kaptcha.Constants;
import com.google.code.kaptcha.Producer;
import com.ideal.manage.esms.config.shiro.MyShiroRealm;
import org.apache.shiro.SecurityUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;

import javax.imageio.ImageIO;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.awt.image.BufferedImage;
import java.io.IOException;

@Controller
public class HelloController {

    @Autowired
    private Producer captchaProducer;

    @RequestMapping({"/","/login"})
    public String login(HttpServletRequest request, HttpServletResponse response, Model model){
        String exception = (String) request.getAttribute("shiroLoginFailure");
        System.out.println("!!!!!"+exception);
        if (exception != null && exception.equals("org.apache.shiro.authc.AuthenticationException")){
            model.addAttribute("error_msg","验证码错误");
        } else if(exception != null && exception.equals("org.apache.shiro.authc.IncorrectCredentialsException")){
            model.addAttribute("error_msg","账号或密码错误");
        }
        MyShiroRealm.ShiroUser user = (MyShiroRealm.ShiroUser) SecurityUtils.getSubject().getPrincipal();
        if (user != null) {
            try {   //在这里面做了转发，因为好像直接return "overview/overview"会有问题
                response.sendRedirect(request.getContextPath()+"/overview/overview");
            } catch (IOException e) {
                e.printStackTrace();
            }
            return null;
        } else {
            return "login";
        }
    }

    @RequestMapping("/captcha")
    public ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response) throws Exception {
        response.setDateHeader("Expires", 0);
        response.setHeader("Cache-Control", "no-store, no-cache, must-revalidate");
        response.addHeader("Cache-Control", "post-check=0, pre-check=0");
        response.setHeader("Pragma", "no-cache");
        response.setContentType("image/jpeg");
        String capText = captchaProducer.createText();
        // 把 验证码 放到session里面去
        request.getSession().setAttribute(Constants.KAPTCHA_SESSION_KEY, capText);
        BufferedImage bi = captchaProducer.createImage(capText);
        ServletOutputStream out = response.getOutputStream();
        ImageIO.write(bi, "jpg", out);
        try {
            out.flush();
        } finally {
            out.close();
        }
        return null;
    }
}
